Title :
Quasi-Static Channel Estimation for Multiuser STBC-OFDM Systems
Author :
Islam, Toufiqul ; Ahmed, Imtiaz ; Mallick, Shankhanaad ; Alam, Fakhrul ; Rahman, AndMd Saifur
Author_Institution :
Dept. of Electr. & Electron. Eng., Bangladesh Univ. of Eng. & Technol., Dhaka
Abstract :
This paper proposes multiuser channel estimation techniques for space time block coded-orthogonal frequency division multiplexing (STBC-OFDM) systems based on simple blocked pilot grid. The estimation of multiuser channels is based on least square (LS) and minimum mean square estimation (MMSE) schemes. Simulation results, for a slowly faded quasi-static channel, reveal that the estimated characteristics closely agree with the actual channel characteristics. Comparison of LS and MMSE performance for various number of users is performed and different Doppler fading effects on MMSE performance are also presented.
Keywords :
OFDM modulation; block codes; channel estimation; least mean squares methods; multiuser channels; space-time codes; Doppler fading effects; blocked pilot grid; least square scheme; minimum mean square estimation scheme; multiuser STBC-OFDM systems; multiuser channel estimation; multiuser channels; quasistatic channel estimation; slowly faded quasistatic channel; space time block coded-orthogonal frequency division multiplexing; Bandwidth; Channel estimation; Fading; MIMO; Multiuser channels; Multiuser detection; OFDM; Space technology; Transmitting antennas; Wireless communication;
Conference_Titel :
Electrical and Computer Engineering, 2006. ICECE '06. International Conference on
Conference_Location :
Dhaka
Print_ISBN :
98432-3814-1
DOI :
10.1109/ICECE.2006.355292
